Ball or roller bearing



'c&16,1923; 1,471,254 A. W. FORBES BALL 0R ROLLER BEARING Filed Dec. 12. 1922 F7617.

locorelating device for Patented Oct. 16, 1923.

ranger AROHIBALD WALLACE FORBES,

OF SANTO DOMINGO, SANTO romeo aarunmc,

WEST INDIES. I

BALL OR ROLLER BEARING.

Application filed December 12, 1922. Serial No. 608380.

To all whom it may concern:

Be it known that I, ARCHIBALD WALLACE Forums, British subject, and .a resident of- Santo Domin o R. D., Santo Domingo Republic, West ndies, have invented certain new and useful Improvements in Ball or Roller Bearings, of which the following is a specification.

This invention relates to a difi'erential or bearings of the type. having three superimposed elements capable of relative sliding or rotary motion and in which the interposed or. intermediate element may have friction-reducing balls or rollers or their'equivalent.

Hitherto the use of ball or roller bearings having an interposed anti-friction element, has been rendered difiicult in many positions. For instance, when applied to reciprocating bearin surfaces, either inclined or 'vertical,

' and an ject to intermittent load and vibration, the balls, roller spacing-device or antifriction spacing placed from their required position.

The present invention provides a means of corelating the movement of the elements of a ball or roller bearing or other bearing of the type described, whereby the travel of the intermediate element or ball or roller spacing element will be in correct ratio relative tojthe bearing surfaces; or whereby any reg- -.ul ated relative movement can be given to the three elements of the hearing.

The device may be inteliposed between a 85 sliding valve and its valve ace or between a piston and the cylinder walls of apump or engine cylinder. The intermediate element may in this latter case act as, a slide sleeve valve. I

According, to the present invention the means for corelating the position of the elements comprises a corelating member carried by the intermediate element and adapted to travel in oppositely-directeddiagonal slots,- guides or grooves in the-opposing. bearingsurfaces, said slots being prefera-b y inclined at equal angles to the direction of travel. The corelating member may consist of a ball, a roller or slide block carried in a slot in the intermediate element.

In order that the invention may be more clearly understood reference is hereinafter made to the accompanying explanatory drawings illustrating the application o'f-my element, are liable to be disinvention, by way of example, to a roller as hearing.

()n the drawings Fig. l is a plan view of the three elements of the roller bearing placed side by side- Fig. 2 is a longitudinal sectional view so through the assembled bearing. Fig. 3 is a side view showing the travelof the bearing.

Fig. 4 illustrates a. modified form of bear- V ing surface. I as The roller bearing illustrated comprises (Fig. 1 three elements A, Band C, the elements and B forming the bearin surfaces or roller aths whilst the element consists of the rol ers 1 and cageor roller-spacing de- 'm vice, 2. The means for corelating the position'of the elements A and B comprises a ball I) protruding from the cage 2 and carried therein. The ball I) engages a diagonal groove 3' in the element A and an opposltelgdirected diagonal groove 4 in the element said grooves being shown as each inclined at 45 degrees to the direction of travel.

In consequence of the equal inclination-of the grooves 3 and 4, the maximum relative no movement between the elements A and B is equal to twice the distance Z (Fig. 1) and in the mid-position (Eifi 2) the ball D will be centrally disposed. y reason of the roll-- ing of the ball D in opposite directions in the grooves of the elements A and B, the ball D will only travel a total distance longitudinally equal to the Ian h Z and in any intermediate position the all D will have travelled a longitudinal distance e ual to' half the relative movement of t e elements A and B.

The element C may be positivelyrelated to only one of the elements A orB bycausing the ball D to engage a guide groove in only one of the elements A or B. 1 The ball D may be mounted in a slot in the element C, or, as shown on the drawing, the ball may travel in a slot or space 5 formed between two of the rollers 1.

In the construction illustrated, the grooves 3 and 4 are of limited length and this limits the travel'of the ball D and consequent relative movement'between the elements A and B. The relative movement may also be 305 limited by the length of the slot 5.

Where the elements A. and B are required to have a greater relative movement than the formation as mdicated in Fig.

The roller bearing by way of example, to the valve face of gate valves or the like.

between two of the rollers Instead of the ball D villustrated on the drawings, I may employ a roller or slide block the ends of which rotrude from the element C, whilst the mi dle portion moves It is not essential that the ball D be carried between the. rollers '1. The ball D ma be mounted in an extension of the r01 er cage 2 and adapted to work in grooves or guides in members forming extensions of the bearing elements A and B. This arran ment may be adopted where it is desira le that the corelating means should be disposed at a; distance 'from the bearing or I rality; of corelating at r ght angles thereto as in Claims .termediate element and ada the case of squarehreaded screw and nut mechanism having interposed spiral ball bearings, in which case the corelating slots would be on the core of the screw and on the crown of the thread of the nut respectively.

'It' will be understood that by .varying the an le of one groove relative to the other, the relative movements of-the three superimposed elementsor surfaces will vary and that almost any predetermined relative movement may be obtained by suitable selection of the angles of the two opposing grooves. v

If increased bearing is required, a pluballs or like members each engaging a pair of ay be mp y adjacent pairs of grooves ppo g w being-preferably opposed in direction in order to.'-mainta1 n equilibrium.

1. Means for corelating the elements of a bearing of the type havlng three elements capable of relative sliding motion, comprising a corelating member carried by the inpted to enga e in oppositely directed diagonal gui e grooves in' the outer elements.

2. Means for corelating the elements of a to travel in a bearing of the type having three elements capable of relative sliding motion, comprising a corelating member reciprocable in a slot in the intermediate element and adapted guide groove in an outer element.

3. Means for corelating the'elements of a bearing of the type having three elements capable of relative sliding motion, comprising a corelating slot in the intermediate element and adapted to travel in oppositely directed diagonal guide ooves in the outer elements.

4. cans for corelating the elements of a bearing of the type having three elements capable of relative sliding motion, comprising a corelating member carried by the intermediate element and adapted to engage in a guide groove in an outer element, the length of said. ii'de groove determining the limit of relative travel of the outer elements.

5. Means for corelating the elements of a bearing of the type having. three elements capable of relative sliding motion, comprising a corelating member carried by the intermediate element and adapted to engage in oppositely directed diagonal guide grooves in the outer elements, the length of said guidegroove determining the limit of relative travel of the outer elements.

6. Means for corelating the elements of a bearing of the type having three elements capable of relative sliding motion, comprising a corelating member carried by the intermediate element' and oppositely forming zig-zag substantially as described.

7 Means for corelating bearing of the'type having three elements capable of relative sliding motion, comprising a ball reciprocable in a slot inthe inter.- mediate member and adapted to travel in oppositely directed diagonal guide grooves in the outer elements.

The foregoing specification signed at Santo Domingo, Dominican Republic, 8th day of November, 1922.

GHIBALD WALLACE FORBES.

member reciprocable in a adapted to travel in directed fdiagonal guide grooves tracks in the outer elements,

the elements'of a this 

